Overview
The ZF 4657.055.101 5 WG 210 Powershift Transmission Assembly | Complete Unit is a fully integrated, factory-built gearbox core designed for heavy-duty off-highway machinery. This complete assembly serves as the primary power transfer module within the WG 210 series, converting engine torque into controlled hydraulic-mechanical drive for wheel loaders, dozers, and graders. The SKU 4657.055.101 represents a drop-in replacement unit that includes all internal clutches, planetary gearsets, and valve bodies pre-assembled. It mounts directly between the torque converter and the axle driveline, with the 4657101081: TRANSMISSION HOUSING providing the structural envelope for the entire rotating assembly.
Symptoms of Failure
- Erratic gear engagement or slipping under load – Worn clutch packs or degraded seals inside the 4657.055.101 cause delayed shifts or complete loss of drive in forward or reverse gears, especially during high-torque operations.
- External oil leaks at housing joints – Cracks or gasket failures in the 4657201166: HOUS.FRONT SECT or 4657201172: HOUSING REAR PART allow transmission fluid to escape, leading to low pressure and overheating.
- Metallic grinding noise during operation – Bearing failure or planetary gear damage within the complete unit produces a distinct whine or grinding sound that intensifies with engine RPM.
- Intermittent loss of hydraulic pressure – Internal valve body wear or debris contamination causes pressure drops, resulting in clutch slip and a “neutral” condition while the engine is running.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.055.101 |
| Assembly Type | Complete Powershift Transmission |
| Series | WG 210 |
| Dry Weight (approx.) | 385 kg (849 lbs) |
| Overall Length | 720 mm |
| Overall Width | 510 mm |
| Overall Height | 580 mm |
| Housing Material | Cast Iron (GGG-40) |
| OEM Reference | ZF 4657.055.101 |
| Bolt Torque Spec | 120 Nm (M12 cap screws) |
| Fluid Capacity | 18.5 L (ZF ECOFLUID) |
Compatibility
This complete unit is engineered for the ZF WG 210 series powershift transmissions. It is directly compatible with models WG 180, WG 200, and WG 210 used in construction and mining equipment from manufacturers such as Caterpillar, Volvo, and Liebherr. The assembly interfaces with the 4657298105: HOUSING REAR SECTION for final drive integration. For partial rebuilds, verify that the 4657201166: HOUS.FRONT SECT and 4657201172: HOUSING REAR PART match your existing casting numbers to ensure proper alignment of the output shaft.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101081 | TRANSMISSION HOUSING | Main structural casing for gearset |
| 4657201166 | HOUS.FRONT SECT | Front section housing input shaft |
| 4657201172 | HOUSING REAR PART | Rear section supporting output bearings |
| 4657298105 | HOUSING REAR SECTION | Extended rear housing for PTO |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636100801 | CAP SCREW | M12 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Locking plate for clutch piston |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M14 bolt for rear housing |
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